Posted by godsgas on December 26, 2008 at 18:46:26 from (70.194.239.177):
In Reply to: Rural propane problems posted by jdemaris on December 21, 2008 at 08:26:04:
Hi,Just told about your problems, My family has been in the lp business for 80 plus years and Ive seen just about everything, New tanks are sometimes filled with water for testing sometimes not, they do need purging to get rid of the air trapped inside them. That can be done by putting 15 psi of gas pressure in them and letting it out at least 5 times, or by using a vacuum pump to pull a good vacuum in the tank before filling it. New tanks have for the last few years been delivered with a vaccum in them allready from the factory. We at my company have never used methanol in new tanks and have never had much of a problem with freeze ups. If it is below 32 then the moisture in the tank is in a solid frozen state and cant come out of the tank and get into the regulators . Most freezes happen at 33 or so and when the pressure of the gas is dropped at the regulator, almost always at the second stage , it refrigerates and drops that last degree or two and the seat assembly freezes . Methanol will cure this, After a tank or two of gas is run through the system the remaining air and moisture should have been purged out, If this is an ongoing problem then the gas is definately contaminated with moisture and it does not take much to freeze things. If it is happening at lower sub zero temps then it is not being caused by moisture inside the tank and could be the vents on the regulators freezing over. The older first stage regulators have tiny vents and must be protected under the tank lid, the second stage can freeze if it gets covered by snow or is under a house eve and gets water running over it or dripping onto it, a split open plastic jug slipped over it will temporarily fix that problem. Propane boils at 44 below zero, if your temps get close to that and you are pulling a large load on the system the tank can zero pressure and everything will stop working, I have never seen temps that low in my area though. There is NO law stating companies must own the tank ! contact the local companies and get a letter from them stating that they DONT own the tank, report that to the new company and if they are human they will fill your tank.The code states; it is unlawful for a propane company to fill a tank that is labeled or marked as the property of another company. They can legaly fill that tank if it is NOT labeled as the property of another company, that is known as the container law. A new tank is about $1000 for a 500 gal tank from the factory .Hope this helps you .
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